Its portable board for playing Baduk(in Korean language, Go in japanese, Weiqi in chinese).
Baduk originated in ancient China, where it has been played for more than 2,500 years. Baduk is played by two players who alternately place black and white stones (playing pieces, usually made of glass or plastic) on the vacant intersections of a grid of 19×19 lines. The object of the game is to control a larger portion of the board than the opponent. A stone or a group of stones is captured and removed if it has no empty adjacent intersections, the result of being completely surrounded by stones of the opposing color.
Placing stones close together helps them support each other and avoid capture. On the other hand, placing stones far apart creates influence across more of the board. Part of the strategic difficulty of the game stems from finding a balance between such conflicting interests. Players strive to serve both defensive and offensive purposes and choose between tactical urgency and strategic plans.
IBaduk doesnt provide computer AI player. But It is well optimized for one or two person playing. It supports magnifying square for accurate stone drop, and supports undo for every step. It also provides mark for last put stone for players conveniency.
You can learn Baduk(Go) easiliy at tutorial site. Let me pick you one.
http://www.pandanet.co.jp/English/learning_go/learning_go_1.html
Enjoy Baduk with your friends.